Tried doing a search but couldn't find anything defining what I was looking for.
Basically I have 1 x 4x4 regulator and 1 x 2WD regulator, the car is a 4x4 saph.
For what I want to do, it looks like the 2WD item would be better due to the connections on it, as it's going to be mounted off the rail as I have got -6 fittings on my rail now.

So my question is, each regulator is stamped up with diferent numbers, what do they mean, and are they interchangeable, I think they could be but always good to check I guess????

 

Anyone know?????

 

they are both equal rising rate regulators so they are interchangeable in that respect

 

The 2wd one is held onto the rail with a bit of pipe which is likely to be old enough to split and set your car on fire.

The 4x4 one seals onto the end of the 4x4 fuel rail with an o ring and is much safer imo.

They are both set at 3.5 bar static pressure as stock and as far as i am aware are not rising rate.

 

They of course do have a rising rate, when on boost and vacuum depletes, hence why fuel pressure is higher with vac off, if they were a set rate they would need no vac connection.
It is easier/quicker/cheaper to replace a tiny 2" bit of pipe with fuel hose than a complete fuel rail with regulator, as in 4wd.
If it is going to be mapped after the install though, you can use any decent quality one, does not need to be a ford one, a fuel labs, sytec or whatever to do the job fine.
tabetha

 

Sums it up lol

 

You are wrong. That is not a rising rate. It is simply a reg that can see vacum and positive pressure. As far as i am aware a cossie reg has a 1:1 rate.

eg. 10 psi of boost and the reg adds 10 psi of fuel pressure to maintain the same pressure differential at the injector.

If it was rising rate it may add 14 psi of fuel pressure for 10 psi of boost.

Rising rate regs are used as a cheap/cheating way to increase fueling eg if you turbocharged your car/bike. Another example of a rising rate reg is the FSE powerboost valves.

 

it does have a 1:1 ratio as you say!

 

i ment it as they have equal pressure differential across the injector, not that is had a ratio OTHER than 1:1

 

Get off this thread and answer my money question!

 

As per Doug's reply, its NOT a rising rate regulator, its a fixed rate regulator and the thing its fixed against is the vac/boost inlet pipe, so that the injectors see a consistant pressure differential between the fuel side of them and the inlet manifold side of them (ie the flow stays the same irrelevant of manifold pressure)

 

One for Ford Parts guys...but didn't that small piece of pipe have a specific Finis code i.e it wasn't just generic fuel injection pipe?